>> somebody anonymous made it. >> but now it appears that someone has a shady past. this is the handy work of aven alleged stalker who is on trial. >> there was a guy who was stalking a young girl, made the labyrinth for her and invited her to come through and walk through it. >> how bizarre. >> wow. this is really intense. that makes me feel less good about it. >> another guy that doesn't know when to, you know, let go. >> the san francisco district attorney's office says 34-year-old cesar lopez, a self-described artist, is now on trial, that he stalked the girl for ten years and blogged about her in this online forum. he also erected labyrinths, one in her image and finally this one, which led to his arrest. the stalking finally ended last year when lopez invited the girl to the labyrinth for a so-called clensingly ritual, instead police met him here.